From ecb5fbe299dfaad778033259f35bc696fa1fb743 Mon Sep 17 00:00:00 2001 From: Wu Hao Date: Sat, 30 Jun 2018 08:53:10 +0800 Subject: fpga: mgr: add status for fpga-manager This patch adds status sysfs interface for fpga manager, it's a read only interface which allows user to get fpga manager status, including full/partial reconfiguration error and other status information. It adds a status callback to fpga_manager_ops too, allows each fpga_manager driver to define its own method to collect latest status from hardware. The following sysfs file is created: * /sys/class/fpga_manager//status Return status of fpga manager, including reconfiguration errors. Signed-off-by: Wu Hao Acked-by: Alan Tull Acked-by: Moritz Fischer Signed-off-by: Greg Kroah-Hartman --- drivers/fpga/fpga-mgr.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) (limited to 'drivers/fpga') diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c index c1564cf827fe..a41b07e37884 100644 --- a/drivers/fpga/fpga-mgr.c +++ b/drivers/fpga/fpga-mgr.c @@ -406,12 +406,40 @@ static ssize_t state_show(struct device *dev, return sprintf(buf, "%s\n", state_str[mgr->state]); } +static ssize_t status_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct fpga_manager *mgr = to_fpga_manager(dev); + u64 status; + int len = 0; + + if (!mgr->mops->status) + return -ENOENT; + + status = mgr->mops->status(mgr); + + if (status & FPGA_MGR_STATUS_OPERATION_ERR) + len += sprintf(buf + len, "reconfig operation error\n"); + if (status & FPGA_MGR_STATUS_CRC_ERR) + len += sprintf(buf + len, "reconfig CRC error\n"); + if (status & FPGA_MGR_STATUS_INCOMPATIBLE_IMAGE_ERR) + len += sprintf(buf + len, "reconfig incompatible image\n"); + if (status & FPGA_MGR_STATUS_IP_PROTOCOL_ERR) + len += sprintf(buf + len, "reconfig IP protocol error\n"); + if (status & FPGA_MGR_STATUS_FIFO_OVERFLOW_ERR) + len += sprintf(buf + len, "reconfig fifo overflow error\n"); + + return len; +} + static DEVICE_ATTR_RO(name); static DEVICE_ATTR_RO(state); +static DEVICE_ATTR_RO(status); static struct attribute *fpga_mgr_attrs[] = { &dev_attr_name.attr, &dev_attr_state.attr, + &dev_attr_status.attr, NULL, }; ATTRIBUTE_GROUPS(fpga_mgr); -- cgit v1.2.3